Question

The formula for kinetic energy is __________

(a) KE = 0.5*m*v

(b) KE = 0.5*m*v^2

(c) KE = m*v^2

(d) KE = 0.6*m*v^2

The question was asked by my college professor while I was bunking the class.

Question is taken from Energy Equation topic in section Aerodynamics – Fundamental Principles and Equations of Aerodynamics

Answer 1

Right option is (b) KE = 0.5*m*v^2

The explanation is: It is product of mass and square of velocity. Kinetic energy comes in picture in case of moving objects and also for the objects which has certain mass. It is defined as the work needed to accelerate a body from its rest to the moving condition.